Finding the Third Proportional to 1,118,646 and 1,678,089

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118,646 : 1,678,089 = 1,678,089 : x
2. Step 2: Convert to fraction form
   1,118,646/1,678,089 = 1,678,089/x
3. Step 3: Cross multiply
   1,118,646x = 1,678,089 × 1,678,089
4. Step 4: Simplify right side
   1,118,646x = 2,815,982,691,921
5. Step 5: Solve for x
   x = 2,815,982,691,921/1,118,646
6. Step 6: Final answer
   x = 2,517,313.51